Coupling-knuckle stop.



E. P. KINNE.

COUPLING KNUCKLE STOP. APPLICATION FILED APR.1, 1914v 1&106345@ PatentedAuglLlQl.

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EDMUND P. KINN, or ALLIANCE, OHIO, AssIGN'oR To AMERICAN STEEL FOUNIJRIES. OF CHICAGO, ILLINOIS, A CORPORATION or NEW JERSEY.

COUILING-KNUCKLE sgroP.

incense.

Specication of Letters Patent. Patgntdl Aug, 1j, jgt,

Application filed April 1, 1914. Serial No. 828,791.

has particular reference to a novel motionlimiting stop associated therewith.

In the operation of railway ,car couplers it is customary to provide stopswhich shall limit the movement of the coupler'knuckle both in Opening and closing. The stopt usually employed for limiting the opening movement of the knuckle is 'a lug cast on either-the top or bottom of the knuckle tail,

` said lug being adapted to coperate with a front wall of the coupler head. Experience has proven', however, that such stops are easily broken even'though constructed of as large size as is possible in view of the restricted space. The strains to which such stops are subjected are usually concussive and inasmuch as such blows are applied many hundreds of times in the life of a coupler, the breakage is not surprising.

`I have lconceived thefidea of providing a stop so arranged as to "distribute the strain over a larger surface and to change the over a greater area.

strain from shear to compression. Therebyl drawings, wherein,

Figure 1 is a plan view of a coupler .knuckle having my improvement applied thereto, the knuckle being mounted in a cou-- pler head which is shown in section, and, Fig. 2 is a section on the line 2-2 of Fig. 1.

Referring more particularly to the draw-l ings it will be seen that my improvement is applied to a car` coupler having a head 10, provided with a front wall 11, through which an opening is made forthe passage of a knuckle tail 12, the knuckle being mounted on a suitable pivot 13, and adapted for Oscillation within the head. On the lower face of the knuckle tail I provide a lug 14, having a beyeled face 15, and adapted Ato cof operate with a similarly inclined surface 16, on the wall 11, said inclined surface forming the lower portion ofthe opening through` which the knuckle tail extends. The upper surface of the knuckle tail moves in close proximity to the horizontal surface 17, which bounds the opening through the wall 11,'at the top. It will be seen that as the knuckle is opened, the surfaces 15, 16, are brought into contact and -the knuckle is forced upwardly into contact with the sur- `face 17. Thus a portion of. the strain is transmitted to the upper portion of the wall 11 and the tendency to breakage of the lug 14, is considerably reduced. Preferably the angle of inclination of the surfaces 15, 16, will be such as to obviate the possibility of wedging.

A construction such as described has been found to be efficient in service, removes the possibility of breakage of the opening stop and involves no added expense in the construction of the coupler.

I claim: l. In a car coupler, the combination of a head` having a front w-all with an opening therethrough, and a knuckle having a tail provided with a motion-limiting stop, said tail being adapted for passage through the opening in said front wall, said stop being constructed to wedge said knuckle tail against the upper and lower bounding edges of the Opening insaid front wall, substantially as described. l

2. In a car coupler, the combination o-f a head having a front wall with an opening therethrough, one edge of said opening. being beveled, and a knuckle having a beveled motion-limiting stop; the beveled surfaces on said stop and said wall being adapted for co- Operation whereby to force said knuckle against an opposite edge of said opening, substantially as described.

Signed at Alliance, Ohio, this 26th day of March 1914.'

EDMUND P. KINNE.

Witnesses LAUNA CARLISLE, BYRON MOC/AUSLAND. 

